基于调制随机共振的微弱信号频率检测方法  

Frequency of Weak Signal Detection Based on Modulation Stochastic Resonance

作　　者：李忠虎[1] 蔡志全[1] 

机构地区：[1]内蒙古科技大学信息工程学院,内蒙古包头014010

出　　处：《仪表技术与传感器》2014年第8期104-106,共3页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(61362023);内蒙古自治区自然科学基金项目(2011MS0917)

摘　　要：以工程实践中被强噪声淹没的微弱信号检测为背景,提出了一种基于调制随机共振的微弱信号频率检测方法。针对常用的随机共振系统检测受到信号的小频率和小幅值的约束,采用调制随机共振检测,进而使大频率信号变为适宜随机共振处理的小频率信号。在Matlab平台上对微弱正弦信号检测进行了仿真研究,实验结果表明该方法能够有效地检测出微弱信号的频率。文中最后给出了调制随机共振实现电路。In the background of weak signal detection which submerged by strong noise in engineering, this paper proposed a detection method based on modulated stochastic resonance in weak signal frequency. Specific to the constraint for inspection of sto- chastic resonance system commonly used by small signal frequency and small amplitude, this paper adopted modulated stochastic resonance detection, thereby enabled changing large stochastic resonance frequency signal into suitable smaller frequency signal. On Matlab platform the simulation of weak sine signal detection was studied, and the results show that the method can effectively detect the weak signal frequency. In the last part the paper gave the stochastic resonance modulation circuit implementation.

关 键 词：微弱信号检测 强噪声 调制随机共振 频率检测 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]